Bencode is a simple script that lets you open and process torrent files from JavaScript. It has no dependencies; is pure JavaScript (not CoffeeScript, etc.); and is simply written, so all can learn/understand it.

KTorrent is a BitTorrent application that allows you to download and share files using the BitTorrent protocol. Key features include queuing of torrents, global and per-torrent speed limits, previewing of certain file types, importing of partially or fully downloaded files, file prioritization for multi-file torrents, selective downloading for multi-file torrents, kick/ban peers with an additional IP Filter dialog for list/edit purposes, UDP tracker support, support for private trackers and torrents, support for µTorrent's peer exchange, support for protocol encryption (compatible with Azureus), support for creating tracker-less torrents, support for distributed hash tables (DHT), support for UPnP to automatically forward ports on a LAN with dynamic assigned hosts, support for webseeds, scripting support via Kross, and interprocess control via DBus interface.

autodl-irssi is an advanced and easy to use torrent file downloader plugin for Irssi. The optional ruTorrent plugin (GUI) makes it even easier to use. The installer will set everything up. It works by connecting to your torrent tracker's IRC announce channel. You tell it exactly which IRC servers and channels to connect to and it does the rest. When a new torrent is announced, and matches one of the user filters, it's immediately downloaded. There's no delay like RSS, which polls once every 5-15 minutes. Once downloaded, the torrent file can be saved to a torrent client watch directory, sent to rtorrent, or uploaded to an FTP server. It supports more than 70 private trackers, and it's very easy to add your own if you know some basic XML and regular expressions. The filters are easy to set up, but also advanced. Some of the filters are release name, TV show name, torrent size, resolution, encoder, source, year, format, bitrate, medium, category, and many more. To prevent you from accidentally downloading too many files at once, you can also tell it to only allow X number of downloads per day, week, or month.

Weboob is a project that provides several applications (console or graphical) to interact with a lot of Web sites. There are more than 90 supported Web sites and 20 applications to view bank accounts, get bills, drag on dating Web sites, search and play videos, display the weather, read news, show train timelines, search torrents, interact with bug trackers, edit a wiki, listen to radio, view and download image galleries, look for a new home, and perform other useful tasks.

TorrentWatch-X is a Web-based tool to automate BitTorrent downloads. This is a fork of the torrentwatch project, now also with NMT support. It is meant to run on Linux and Mac OS X with different BitTorrent clients (for now, only Transmission is supported directly) and make it work in all Web browsers. It supports RSS feeds from a few torrent sites that offer TV shows. It can save torrent files in any folder, so any torrent client can pick it up. It can tell Transmission to save data in any folder. It can tell Transmission to stop when a certain ratio is reached. Authentication with Transmission is supported. Your own RSS feed can be added.

TurnKey Torrent Server Appliance is a file server appliance with integrated multi-protocol file sharing that can be used to handle all types of file downloads. Files can be added to the download list using the Torrent Server handler extension for Firefox or through a simple Web interface that allows you to manage the server remotely. It is especially useful for centralizing file sharing on a shared network. Anti-virus scanning is included.

BuddyServ IRC Services are a set of integrated IRC services for torrent networks. They integrate with a Torrent site database and provide support for using a Web site's account database, new torrent announcements, new user, reports, and helpdesk staff notifications, syslog reporting, many user management tools, including the ability to disable/enable accounts, RRD graphs for IRC activity, channel management, default vhosts based on user class and custom vhosts, OPERWALL error reporting, a !next command for next TV show viewing times, an InterMail system for reading and sending site messages on IRC, NickServ, ChanServ, OperServ, MemoServ, UserBot, and monitor services, and more.